Update provider plugin versions in tutorial docs

* Update terraform provider plugin version in docs to reflect
the recommended current versions that are currently used

docs/cl/aws.md

@@ -49,7 +49,7 @@ Configure the AWS provider to use your access key credentials in a `providers.tf
 
 ```tf
 provider "aws" {
-  version = "~> 2.6.0"
+  version = "~> 2.8.0"
   alias   = "default"
 
   region                  = "eu-central-1"

docs/cl/azure.md

@@ -50,7 +50,7 @@ Configure the Azure provider in a `providers.tf` file.
 
 ```tf
 provider "azurerm" {
-  version = "~> 1.24.0"
+  version = "~> 1.27.1"
   alias   = "default"
 }
 

docs/cl/digital-ocean.md

@@ -50,7 +50,7 @@ Configure the DigitalOcean provider to use your token in a `providers.tf` file.
 
 ```tf
 provider "digitalocean" {
-  version = "~> 1.1.0"
+  version = "~> 1.2.0"
   token = "${chomp(file("~/.config/digital-ocean/token"))}"
   alias = "default"
 }

docs/cl/google-cloud.md

@@ -49,7 +49,7 @@ Configure the Google Cloud provider to use your service account key, project-id,
 
 ```tf
 provider "google" {
-  version = "~> 2.3.0"
+  version = "~> 2.5.1"
   alias   = "default"
 
   credentials = "${file("~/.config/google-cloud/terraform.json")}"